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San Blas Weather Records (MXN00025082)

Record envelope, standing records and threshold days for San Blas (MXN00025082), Mexico, with 41 years of record.

Key Facts for San Blas

  • San Blas (MXN00025082) is a weather station in Mexico at 26.07 latitude and -108.75 longitude, 36 m (118 ft) above sea level.
  • The station reports from 1961 to 2001, 41 years of record.
  • 1,464 records set at San Blas still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • San Blas tied a daily record low minimum temperature of 20.0 C (68.0 F) on 31 July 2001.

About the Station

  • Location: Mexico, 26.07 latitude, -108.75 longitude.
  • Elevation: 36 m (118 ft).
  • Period of record: 1961 to 2001, 41 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at San Blas, with 2026 drawn through them The band shows the record high and record low for each calendar day at San Blas. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at San Blas. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at San Blas, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan39.4 C (102.9 F)-1.1 C (30.0 F)n/an/a
Feb38.3 C (100.9 F)-0.6 C (30.9 F)n/an/a
Mar40.0 C (104.0 F)0.0 C (32.0 F)n/an/a
Apr42.8 C (109.0 F)1.1 C (34.0 F)n/an/a
May44.4 C (111.9 F)5.6 C (42.1 F)n/an/a
Jun45.0 C (113.0 F)8.9 C (48.0 F)n/an/a
Jul48.3 C (118.9 F)17.8 C (64.0 F)n/an/a
Aug46.1 C (115.0 F)14.4 C (57.9 F)n/an/a
Sep45.6 C (114.1 F)13.3 C (55.9 F)n/an/a
Oct45.0 C (113.0 F)6.7 C (44.1 F)n/an/a
Nov40.0 C (104.0 F)0.6 C (33.1 F)n/an/a
Dec35.6 C (96.1 F)-2.2 C (28.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at San Blas by the year they were set 1,464 records at San Blas still stand. 1973 holds the most, with 69. 0204060801961: 341962: 311963: 271964: 551965: 341966: 301967: 401968: 391969: 341970: 381971: 581972: 381973: 691974: 461975: 601976: 541977: 331978: 321979: 281980: 291981: 261982: 371983: 251984: 271985: 231986: 531987: 411988: 431989: 301990: 301991: 191992: 241993: 171994: 191995: 281996: 241997: 221998: 401999: 542000: 612001: 12196119661971197619811986199119962001
1,464 records at San Blas still stand. 1973 holds the most, with 69.
Standing records at San Blas by the year they were set
Year setStanding records
196134
196231
196327
196455
196534
196630
196740
196839
196934
197038
197158
197238
197369
197446
197560
197654
197733
197832
197928
198029
198126
198237
198325
198427
198523
198653
198741
198843
198930
199030
199119
199224
199317
199419
199528
199624
199722
199840
199954
200061
200112

All-Time Record Progression

2 new records
When San Blas set new all-time records 2 all-time records were set at San Blas between 14 September 1995 and 19 July 2000. Each dot is a new record. Record daily precipitationRecord high maximum temperature14 September 1995: Record daily precipitation 221.0 mm (8.7 in)19 July 2000: Record high maximum temperature 48.3 C (118.9 F)19952000
2 all-time records were set at San Blas between 14 September 1995 and 19 July 2000. Each dot is a new record.
When San Blas set new all-time records
DateKindDetail
1995-09-14Record daily precipitationRecord daily precipitation 221.0 mm (8.7 in)
2000-07-19Record high maximum temperatureRecord high maximum temperature 48.3 C (118.9 F)

Wettest Day of Each Month

Sep: 221.0 mm (8.7 in)
Record daily precipitation for each month at San Blas The wettest day on record for each calendar month at San Blas. The most was 221.0 mm (8.7 in) on 14 September 1995. 0100200300 Jan: 58.2 mm (2.3 in), 29 January 1984 Jan Feb: 35.8 mm (1.4 in), 1 February 1989 Feb Mar: 45.0 mm (1.8 in), 19 March 1970 Mar Apr: 8.9 mm (0.35 in), 11 April 1968 Apr May: 13.5 mm (0.5 in), 18 May 1979 May Jun: 59.2 mm (2.3 in), 29 June 1976 Jun Jul: 172.0 mm (6.8 in), 3 July 1986 Jul Aug: 97.8 mm (3.9 in), 2 August 1993 Aug Sep: 221.0 mm (8.7 in), 14 September 1995 Sep Oct: 95.3 mm (3.8 in), 7 October 1981 Oct Nov: 87.9 mm (3.5 in), 1 November 1990 Nov Dec: 77.0 mm (3.0 in), 8 December 1982 Dec
The wettest day on record for each calendar month at San Blas. The most was 221.0 mm (8.7 in) on 14 September 1995.
Record daily precipitation for each month at San Blas
MonthRecord daily precipitation (mm)Date
Jan58.2 mm (2.3 in)29 January 1984
Feb35.8 mm (1.4 in)1 February 1989
Mar45.0 mm (1.8 in)19 March 1970
Apr8.9 mm (0.35 in)11 April 1968
May13.5 mm (0.5 in)18 May 1979
Jun59.2 mm (2.3 in)29 June 1976
Jul172.0 mm (6.8 in)3 July 1986
Aug97.8 mm (3.9 in)2 August 1993
Sep221.0 mm (8.7 in)14 September 1995
Oct95.3 mm (3.8 in)7 October 1981
Nov87.9 mm (3.5 in)1 November 1990
Dec77.0 mm (3.0 in)8 December 1982

Period of Record Coverage

1961 to 2001
Days with data per year at San Blas 41 years of record at San Blas, 1961 to 2001. 2 years have data for under 90 percent of days and are left out of rankings: 1985, 2001. 1961: 364 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 362 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 365 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 364 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 364 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 365 of 365 days1983: 364 of 365 days1984: 366 of 366 days1985: 243 of 365 days1986: 364 of 365 days1987: 335 of 365 days1988: 335 of 366 days1989: 365 of 365 days1990: 363 of 365 days1991: 365 of 365 days1992: 366 of 366 days1993: 365 of 365 days1994: 363 of 365 days1995: 364 of 365 days1996: 366 of 366 days1997: 365 of 365 days1998: 363 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 212 of 365 days1970198019902000
41 years of record at San Blas, 1961 to 2001. 2 years have data for under 90 percent of days and are left out of rankings: 1985, 2001.
Days with data per year at San Blas
YearDays with dataShare of yearComplete
1961364100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
196536299%Yes
1966365100%Yes
1967365100%Yes
1968365100%Yes
1969365100%Yes
1970365100%Yes
1971364100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
1977364100%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
1981365100%Yes
1982365100%Yes
1983364100%Yes
1984366100%Yes
198524367%No
1986364100%Yes
198733592%Yes
198833592%Yes
1989365100%Yes
199036399%Yes
1991365100%Yes
1992366100%Yes
1993365100%Yes
199436399%Yes
1995364100%Yes
1996366100%Yes
1997365100%Yes
199836399%Yes
1999365100%Yes
2000366100%Yes
200121258%No

Latest Records

20
Latest records at San Blas
DateStationRecordValueBeat old record byOld record stoodSignificance
31 July 2001San Blas, MXdaily low min (Tie)20.0 C (68.0 F)tie36 years3 of 100 (Routine)
30 July 2001San Blas, MXdaily high max46.1 C (115.0 F)0.5 C (0.9 F)4 years6 of 100 (Routine)
27 July 2001San Blas, MXdaily low min (Tie)18.3 C (64.9 F)tie24 years2 of 100 (Routine)
23 July 2001San Blas, MXdaily rain43.9 mm (1.7 in)9.1 mm (0.36 in)35 years19 of 100 (Routine)
11 July 2001San Blas, MXdaily low min20.0 C (68.0 F)1.1 C (2.0 F)40 years21 of 100 (Routine)
28 June 2001San Blas, MXdaily rain25.9 mm (1.0 in)8.1 mm (0.32 in)11 years13 of 100 (Routine)
27 June 2001San Blas, MXdaily high max44.4 C (111.9 F)1.1 C (2.0 F)15 years11 of 100 (Routine)
23 June 2001San Blas, MXdaily high max (Tie)43.3 C (109.9 F)tie3 years1 of 100 (Routine)
19 June 2001San Blas, MXdaily rain3.8 mm (0.15 in)1.8 mm (0.07 in)24 years12 of 100 (Routine)
17 June 2001San Blas, MXdaily rain39.9 mm (1.6 in)32.0 mm (1.3 in)16 years33 of 100 (Routine)
9 June 2001San Blas, MXdaily high min (Tie)25.0 C (77.0 F)tie11 years1 of 100 (Routine)
7 June 2001San Blas, MXdaily high max (Tie)43.3 C (109.9 F)tie12 years1 of 100 (Routine)
6 June 2001San Blas, MXdaily high max43.3 C (109.9 F)1.1 C (2.0 F)14 years11 of 100 (Routine)
4 June 2001San Blas, MXdaily high min (Tie)25.0 C (77.0 F)tie16 years2 of 100 (Routine)
18 May 2001San Blas, MXdaily high min22.2 C (72.0 F)0.5 C (0.9 F)23 years11 of 100 (Routine)
17 May 2001San Blas, MXdaily high max (Tie)42.2 C (108.0 F)tie15 years2 of 100 (Routine)
15 May 2001San Blas, MXdaily high max43.3 C (109.9 F)1.1 C (2.0 F)0 years7 of 100 (Routine)
8 May 2001San Blas, MXdaily high max (Tie)42.2 C (108.0 F)tie16 years2 of 100 (Routine)
3 May 2001San Blas, MXdaily rain1.8 mm (0.07 in)1.8 mm (0.07 in)40 years17 of 100 (Routine)
3 May 2001San Blas, MXdaily low max (Tie)29.4 C (84.9 F)tie24 years2 of 100 (Routine)

Climate Trend

37 complete years, 1961 to 2000
Annual mean temperature at San Blas as warming stripes, 1961 to 2000 One stripe for each of 37 complete years at San Blas, 1961 to 2000. Blue stripes are years cooler than the station's own mean of 24.6 C (76.3 F); red stripes are warmer. The coolest year was 1975, at 21.7 C (71.1 F), and the warmest was 1986, at 26.6 C (79.9 F). The strongest colour marks a difference of 3.0 C (5.4 F). 1961: 23.4 C, -1.2 C from the station mean1962: 23.7 C, -1.0 C from the station mean1963: 23.9 C, -0.7 C from the station mean1964: 22.5 C, -2.2 C from the station mean1965: 22.8 C, -1.9 C from the station mean1966: 23.2 C, -1.4 C from the station mean1967: 22.8 C, -1.8 C from the station mean1968: 23.0 C, -1.6 C from the station mean1969: 23.1 C, -1.6 C from the station mean1970: 22.8 C, -1.8 C from the station mean1971: 22.1 C, -2.5 C from the station mean1972: 22.8 C, -1.8 C from the station mean1973: 22.2 C, -2.4 C from the station mean1974: 22.2 C, -2.4 C from the station mean1975: 21.7 C, -2.9 C from the station mean1976: 23.4 C, -1.3 C from the station mean1977: 25.9 C, +1.3 C from the station mean1978: 25.7 C, +1.1 C from the station mean1979: 25.2 C, +0.6 C from the station mean1980: 25.9 C, +1.2 C from the station mean1981: 25.7 C, +1.1 C from the station mean1982: 26.2 C, +1.5 C from the station mean1983: 25.7 C, +1.0 C from the station mean1984: 25.9 C, +1.3 C from the station mean1986: 26.6 C, +2.0 C from the station mean1989: 25.9 C, +1.3 C from the station mean1990: 25.9 C, +1.2 C from the station mean1991: 25.7 C, +1.1 C from the station mean1992: 26.0 C, +1.4 C from the station mean1993: 26.2 C, +1.6 C from the station mean1994: 26.4 C, +1.7 C from the station mean1995: 26.5 C, +1.8 C from the station mean1996: 26.2 C, +1.6 C from the station mean1997: 26.0 C, +1.4 C from the station mean1998: 26.0 C, +1.4 C from the station mean1999: 26.0 C, +1.3 C from the station mean2000: 26.2 C, +1.6 C from the station mean196119651970197519801985199019952000
One stripe for each of 37 complete years at San Blas, 1961 to 2000. Blue stripes are years cooler than the station's own mean of 24.6 C (76.3 F); red stripes are warmer. The coolest year was 1975, at 21.7 C (71.1 F), and the warmest was 1986, at 26.6 C (79.9 F). The strongest colour marks a difference of 3.0 C (5.4 F).
Annual mean temperature at San Blas as warming stripes, 1961 to 2000
YearAnnual mean temperatureDifference from the station mean
196123.4 C-1.22 C
196223.7 C-0.95 C
196323.9 C-0.74 C
196422.5 C-2.15 C
196522.8 C-1.86 C
196623.2 C-1.43 C
196722.8 C-1.79 C
196823.0 C-1.62 C
196923.1 C-1.55 C
197022.8 C-1.84 C
197122.1 C-2.52 C
197222.8 C-1.80 C
197322.2 C-2.41 C
197422.2 C-2.40 C
197521.7 C-2.92 C
197623.4 C-1.28 C
197725.9 C+1.28 C
197825.7 C+1.07 C
197925.2 C+0.56 C
198025.9 C+1.25 C
198125.7 C+1.08 C
198226.2 C+1.55 C
198325.7 C+1.05 C
198425.9 C+1.31 C
198626.6 C+1.99 C
198925.9 C+1.31 C
199025.9 C+1.25 C
199125.7 C+1.08 C
199226.0 C+1.38 C
199326.2 C+1.58 C
199426.4 C+1.75 C
199526.5 C+1.83 C
199626.2 C+1.60 C
199726.0 C+1.37 C
199826.0 C+1.40 C
199926.0 C+1.35 C
200026.2 C+1.59 C

The annual mean temperature here has risen by 1.1 C (0.8 to 1.4) per decade over 1961 to 2000. In Fahrenheit: 2.0 F (1.5 to 2.5) per decade. The slope is a straight line fitted to 37 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at San Blas
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature1.1 C (0.8 to 1.4) per decade2.0 F (1.5 to 2.5) per decade1961 to 200037Rise
Mean daily maximum1.4 C (1.1 to 1.7) per decade2.5 F (2.0 to 3.0) per decade1961 to 200037Rise
Mean daily minimum0.8 C (0.5 to 1.1) per decade1.5 F (0.9 to 2.0) per decade1961 to 200037Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1961 to 2001
Yearly extremes at San Blas: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)48.3 C (118.9 F)200043.9 C (111.0 F)41
Coldest night (TNn)-2.2 C (28.0 F)19662.2 C (36.0 F)41
Wettest day (Rx1day)221.0 mm (8.7 in)199566.8 mm (2.6 in)41
Wettest five days (Rx5day)246.2 mm (9.7 in)1995101.5 mm (4.0 in)41
Longest dry spell (CDD)183 days1963115 days41

Hottest day (TXx)

Hottest day (TXx) at San Blas by year The hottest day of the year at San Blas, 1961 to 2001. The record is 48.3 C (118.9 F) in 2000, marked on the chart; the median year is 43.9 C (111.0 F). 4042.54547.5501970198019902000Record: 48.3 C (118.9 F) in 2000
The hottest day of the year at San Blas, 1961 to 2001. The record is 48.3 C (118.9 F) in 2000, marked on the chart; the median year is 43.9 C (111.0 F).
Hottest day (TXx) at San Blas by year
YearHottest day (TXx)
196141.7 C (107.1 F)
196242.8 C (109.0 F)
196345.0 C (113.0 F)
196441.7 C (107.1 F)
196540.0 C (104.0 F)
196640.6 C (105.1 F)
196740.0 C (104.0 F)
196840.6 C (105.1 F)
196944.4 C (111.9 F)
197041.7 C (107.1 F)
197140.0 C (104.0 F)
197241.1 C (106.0 F)
197341.1 C (106.0 F)
197440.0 C (104.0 F)
197540.0 C (104.0 F)
197641.1 C (106.0 F)
197742.2 C (108.0 F)
197842.8 C (109.0 F)
197944.4 C (111.9 F)
198043.3 C (109.9 F)
198142.8 C (109.0 F)
198245.0 C (113.0 F)
198343.3 C (109.9 F)
198445.0 C (113.0 F)
198542.8 C (109.0 F)
198645.0 C (113.0 F)
198745.0 C (113.0 F)
198846.7 C (116.1 F)
198945.0 C (113.0 F)
199043.9 C (111.0 F)
199143.9 C (111.0 F)
199243.9 C (111.0 F)
199343.9 C (111.0 F)
199443.9 C (111.0 F)
199543.9 C (111.0 F)
199645.6 C (114.1 F)
199745.0 C (113.0 F)
199845.0 C (113.0 F)
199945.6 C (114.1 F)
200048.3 C (118.9 F)
200146.1 C (115.0 F)

Coldest night (TNn)

Coldest night (TNn) at San Blas by year The coldest night of the year at San Blas, 1961 to 2001. The record is -2.2 C (28.0 F) in 1966, marked on the chart; the median year is 2.2 C (36.0 F). -2.502.557.51970198019902000Record: -2.2 C (28.0 F) in 1966
The coldest night of the year at San Blas, 1961 to 2001. The record is -2.2 C (28.0 F) in 1966, marked on the chart; the median year is 2.2 C (36.0 F).
Coldest night (TNn) at San Blas by year
YearColdest night (TNn)
19612.2 C (36.0 F)
19620.0 C (32.0 F)
1963-0.6 C (30.9 F)
1964-0.6 C (30.9 F)
19651.1 C (34.0 F)
1966-2.2 C (28.0 F)
19670.6 C (33.1 F)
19683.3 C (37.9 F)
19690.0 C (32.0 F)
19700.0 C (32.0 F)
1971-1.1 C (30.0 F)
19722.2 C (36.0 F)
19730.0 C (32.0 F)
19740.0 C (32.0 F)
19750.0 C (32.0 F)
19760.6 C (33.1 F)
19772.8 C (37.0 F)
19783.9 C (39.0 F)
19792.8 C (37.0 F)
19804.4 C (39.9 F)
19815.0 C (41.0 F)
19822.8 C (37.0 F)
19835.0 C (41.0 F)
19845.0 C (41.0 F)
19856.1 C (43.0 F)
19865.0 C (41.0 F)
19870.6 C (33.1 F)
19881.7 C (35.1 F)
19891.7 C (35.1 F)
19905.0 C (41.0 F)
19915.6 C (42.1 F)
19923.9 C (39.0 F)
19935.6 C (42.1 F)
19943.9 C (39.0 F)
19955.0 C (41.0 F)
19963.9 C (39.0 F)
19971.7 C (35.1 F)
19983.3 C (37.9 F)
19992.2 C (36.0 F)
20002.2 C (36.0 F)
20013.3 C (37.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at San Blas by year The wettest day of the year at San Blas, 1961 to 2001. The record is 221.0 mm (8.7 in) in 1995, marked on the chart; the median year is 66.8 mm (2.6 in). 0501001502002501970198019902000Record: 221.0 mm (8.7 in) in 1995
The wettest day of the year at San Blas, 1961 to 2001. The record is 221.0 mm (8.7 in) in 1995, marked on the chart; the median year is 66.8 mm (2.6 in).
Wettest day (Rx1day) at San Blas by year
YearWettest day (Rx1day)
196156.9 mm (2.2 in)
196247.2 mm (1.9 in)
196378.0 mm (3.1 in)
196460.2 mm (2.4 in)
196545.0 mm (1.8 in)
196671.4 mm (2.8 in)
1967121.9 mm (4.8 in)
196857.9 mm (2.3 in)
196946.7 mm (1.8 in)
197066.5 mm (2.6 in)
197149.0 mm (1.9 in)
197295.8 mm (3.8 in)
197347.5 mm (1.9 in)
197466.8 mm (2.6 in)
197595.0 mm (3.7 in)
1976124.0 mm (4.9 in)
197765.8 mm (2.6 in)
197851.1 mm (2.0 in)
197950.3 mm (2.0 in)
198034.0 mm (1.3 in)
198195.3 mm (3.8 in)
1982111.8 mm (4.4 in)
198395.0 mm (3.7 in)
198485.9 mm (3.4 in)
198554.9 mm (2.2 in)
1986172.0 mm (6.8 in)
198756.9 mm (2.2 in)
198879.0 mm (3.1 in)
198948.8 mm (1.9 in)
199087.9 mm (3.5 in)
199147.0 mm (1.9 in)
199265.8 mm (2.6 in)
199397.8 mm (3.9 in)
199474.9 mm (2.9 in)
1995221.0 mm (8.7 in)
199691.9 mm (3.6 in)
199771.9 mm (2.8 in)
1998169.9 mm (6.7 in)
199949.8 mm (2.0 in)
200072.9 mm (2.9 in)
200143.9 mm (1.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at San Blas by year The wettest five days of the year at San Blas, 1961 to 2001. The record is 246.2 mm (9.7 in) in 1995, marked on the chart; the median year is 101.5 mm (4.0 in). 0501001502002501970198019902000Record: 246.2 mm (9.7 in) in 1995
The wettest five days of the year at San Blas, 1961 to 2001. The record is 246.2 mm (9.7 in) in 1995, marked on the chart; the median year is 101.5 mm (4.0 in).
Wettest five days (Rx5day) at San Blas by year
YearWettest five days (Rx5day)
196174.4 mm (2.9 in)
196266.5 mm (2.6 in)
1963166.7 mm (6.6 in)
196476.3 mm (3.0 in)
196572.2 mm (2.8 in)
196697.8 mm (3.9 in)
1967173.0 mm (6.8 in)
1968168.2 mm (6.6 in)
196947.0 mm (1.9 in)
1970113.9 mm (4.5 in)
1971130.1 mm (5.1 in)
1972134.7 mm (5.3 in)
197355.7 mm (2.2 in)
1974114.6 mm (4.5 in)
1975111.6 mm (4.4 in)
1976169.7 mm (6.7 in)
1977131.4 mm (5.2 in)
197873.3 mm (2.9 in)
197974.9 mm (2.9 in)
198061.3 mm (2.4 in)
198197.6 mm (3.8 in)
1982119.2 mm (4.7 in)
1983116.2 mm (4.6 in)
1984187.3 mm (7.4 in)
198554.9 mm (2.2 in)
1986177.8 mm (7.0 in)
198756.9 mm (2.2 in)
198892.8 mm (3.7 in)
198971.5 mm (2.8 in)
1990139.7 mm (5.5 in)
199181.3 mm (3.2 in)
199294.6 mm (3.7 in)
1993170.9 mm (6.7 in)
199474.9 mm (2.9 in)
1995246.2 mm (9.7 in)
1996104.1 mm (4.1 in)
1997101.5 mm (4.0 in)
1998188.5 mm (7.4 in)
199965.5 mm (2.6 in)
200076.7 mm (3.0 in)
2001101.6 mm (4.0 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at San Blas by year The longest dry spell of the year at San Blas, 1961 to 2001. The record is 183 days in 1963, marked on the chart; the median year is 115 days. 501001502001970198019902000Record: 183 days in 1963
The longest dry spell of the year at San Blas, 1961 to 2001. The record is 183 days in 1963, marked on the chart; the median year is 115 days.
Longest dry spell (CDD) at San Blas by year
YearLongest dry spell (CDD)
1961143 days
1962150 days
1963183 days
196497 days
1965115 days
1966133 days
196751 days
196875 days
1969137 days
1970104 days
1971119 days
1972144 days
1973130 days
1974109 days
1975148 days
1976135 days
197790 days
1978145 days
1979102 days
1980107 days
198179 days
1982173 days
198375 days
1984104 days
198558 days
198678 days
1987132 days
198891 days
198999 days
1990110 days
1991122 days
1992123 days
1993128 days
1994170 days
1995129 days
199697 days
199791 days
1998125 days
1999100 days
2000157 days
200162 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Rainfall Return Levels

39 years, 1961 to 2000

A day with at least 69.2 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 244.0 mm (9.6 in) of rain is expected about once in 100 years.

Rainfall return levels at San Blas: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years69.2 mm (2.7 in)
5 years99.7 mm (3.9 in)
10 years125.2 mm (4.9 in)
25 years164.9 mm (6.5 in)
50 years201.2 mm (7.9 in)Longer than the 39 years of record
100 years244.0 mm (9.6 in)Longer than the 39 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 39 years of values from 1961 to 2000.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 221.0 mm (8.7 in) in 1995; 172.0 mm (6.8 in) in 1986; 169.9 mm (6.7 in) in 1998.

Download the Data

  • Data for San Blas standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for San Blas threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2025-12-31).